Coming to -advmethods today are two interesting WUs. They are classic WUs that use the new a4 core. The a4 core will allow a WU to be run in single or multi-threaded mode, so if you're running v6.34 of the client with the -smp flag and advanced methods set, you will start seeing more and more of WUs of this type. Production is slightly higher than average a3 ppd. Who knows, it may turn out to be a setting that avoids p670x.